Hollywood royalty used to use body doubles for filming sex scenes in their films; the thought of them baring it all was almost a joke. But as sex and nudity have taken a more artsy approach on screen, celebrities are jumping at the chance to take their careers to a more risqué level...

We think Heather Graham looks smoking hot at the London premiere of "The Hangover" yesterday. What do you think of her tight blue dress? See more photos after the jump...